MOSCOW, June 8. /TASS/. Gazprom plans to invest $2.5 bln in the development of the Belarusian gas pipeline system till 2020, according to the documents prepared to the working visit of Russia’s President Vladimir Putin to the country.

"Gazprom is the owner of the Belarusian section of the Yamal-Europe gas pipeline. Gazprom plans to invest $2-2.5 bln in the development of the Belarusian gas pipeline system and $1.1 bln in boosting the capacity of underground gas storage facilities (in Belarus) till 2020," the document said.

Russia is the key supplier of oil and gas to Belarus, with annual deliveries totaling around 21.5 mln tonnes of oil and 20 bln cubic meters of gas.